We have observed this behaviour now a couple of times: After triggering RTL the drone flies over its destination point, but breaks out a few meters to north-east. This behaviour can be seen in the local position x and local position y graphs in https://review.px4.io/plot_app?log=a52c8e3e-0ce8-4bba-a19e-ed40d4ba0490 where the estimated (=percepted by us!) deviates from the setpoint.